CN1232661C - Method for cooling work pieces especially shape-rolled products from rail steel - Google Patents

Method for cooling work pieces especially shape-rolled products from rail steel Download PDF

Info

Publication number
CN1232661C
CN1232661C CNB028151186A CN02815118A CN1232661C CN 1232661 C CN1232661 C CN 1232661C CN B028151186 A CNB028151186 A CN B028151186A CN 02815118 A CN02815118 A CN 02815118A CN 1232661 C CN1232661 C CN 1232661C
Authority
CN
China
Prior art keywords
cooling
temperature
parameter
refrigerating module
workpiece
Prior art date
Application number
CNB028151186A
Other languages
Chinese (zh)
Other versions
CN1537175A (en
Inventor
K·屈珀斯
M·迈尔
T·内尔查克
U·普洛茨恩尼克
Original Assignee
Sms米尔股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to DE10137596.4 priority Critical
Priority to DE10137596A priority patent/DE10137596A1/en
Application filed by Sms米尔股份有限公司 filed Critical Sms米尔股份有限公司
Publication of CN1537175A publication Critical patent/CN1537175A/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7693931&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CN1232661(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application granted granted Critical
Publication of CN1232661C publication Critical patent/CN1232661C/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/04Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00Process control or regulation for heat treatments
    • C21D11/005Process control or regulation for heat treatments for cooling

Abstract

The invention relates to a method for producing especially shape-rolled products from rail steels that have a finely perlitic and/or ferritic/perlitic structure after cooling. The inventive method is characterized by guiding the workpiece through a cooling stretch that is composed of individual independent cooling modules (2a-e) having independently adjustable cooling parameters. Between said cooling modules (2a-e) intermediate zones (5a-e) are provided for relieving the stress of the structure comprising means for determining the actual temperature (TLIST) of the respective work piece in said intermediate zones (5a-e) Depending on the respective actual temperature values (TLIST) of the work piece in an intermediate zone (5a-e) the specific cooling parameters, especially the cooling intensity, of the respective subsequent cooling module (2b-e) are controlled in order to safeguard a defined temperature of the work piece during the entire passage through the cooling stretch (1), the defined temperature (TSOLL) of the work piece being above a critical temperature at which the bainitic portions of the structure are formed.

Description

The method of cooling of workpiece and the shaped steel rolled piece that especially constitutes by rail steel
Technical field
The present invention relates to the work-piece cools method, have rolled piece nodular troostite tissue or ferrite/pearlitic structure, that constitute by rail steel and here be the method for shaped steel rolled piece in particular for cooling, the workpiece that wherein makes hot workpiece promptly have austenite structure has the cooling section of an inlet region and an outlet area and accepts a cooling operations through one, has experienced the transformation that becomes pearlitic structure or ferrite/pearlitic structure in this case.
Background technology
Rail steel is mainly used in makes rail and web member and mounting block.By wheel act on the vertical power of rail and side force as normal force, guiding force, accelerating force and damping force cause in the direct zone of action very high dynamic load and cause the steel viscous deformation.This load causes the loss phenomenon that is material slippage, wearing and tearing, material fracture, local material fatigue or crackle form.The raising of rail wear-resistant phenomenon ability can obtain by improve the limit of stretch of rail and tensile strength and fatigue strength thereof with stria shape pearlitic structure as far as possible relevantly.
According to prior art, rail steel is finished the transformation that becomes pearlitic structure under common cooling conditions on the cold bed.In this case, the rail steel with ferrite-pearlite tissue has 700-900N/mm 2Tensile strength, and the steel with pearlitic structure to surpass 900N/mm 2Tensile strength values.The salient features of rail steel is decided by the quantity and the morphological structure thereof of ferrite/pearlitic structure.Interlamellar spacing has all been played the part of a role in perlitic steel and ferrite/perlitic steel.
EP0725152A1 discloses a kind of method and apparatus of cooling hot-rolled rail section bar.By a computer system, calculate the cooling power that is adapted to the shaped steel geometrical shape,, especially to consider the rail head geometrical shape here with the rail foot with comparing.So this cooling is performed such, promptly to become ferrite and/or pearlitic transformation be to finish under the situation very nearly the same in time to the tissue in rail head and rail foot, to avoid the rail warpage.
US-A-4486248 also relates to the cooling of rail section bar.In the method, mainly cool off rail head.Reheating of waste heat in the rail foot taken place to utilize in the intermediate zone that joins.As destination organization, should adjust the volume amount pearlitic structure seldom of bainite.
At last, US4638851 relates to the cooling of metal strip, and it for example is at the successive band in the modified or strap electroplating.
Summary of the invention
Task of the present invention provides a kind of method of the shaped steel rolled piece that is used to make workpiece and especially is made of rail steel, and this workpiece has mechanical property and the fine strip shape pearlitic structure or the ferrite/pearlitic structure of improvement.
This task is finished by a kind of method with feature of claim 1.Favourable improving one's methods described in the dependent claims.
Proposed according to this method, make this workpiece and for example be rolled piece or also may be that continuous casting section bar begins through a cooling section from (rolling) is hot, this cooling section comprises refrigerating module independently a plurality of and that have the cooling parameter that can irrespectively set up each other, the a plurality of intermediate zones that wherein between refrigerating module, are useful on soaking or are used to eliminate thermal stresses, these intermediate zones have determine in these between the device of each workpiece actual temperature in the district, here, adjust specific cooling parameter and the especially cooling intensity of follow-up at least separately refrigerating module according to the actual temperature value separately of an intermediate zone or each intermediate zone, so that adjust (surface) temperature of a regulation of workpiece in the process whole process of cooling section, wherein the specified temperature of this workpiece is on the critical temperature of the structural constituent of a formation bainite structure.
Thereby, basic conception of the present invention is exactly the cooling of controlling the workpiece that is made of rail steel according to such measure in a cooling section, promptly the surface temperature of the workpiece that is made of rail steel so reduces, thereby ideal pearlitic structure or ferrite/pearlitic structure have appearred, wherein by through eliminating stress the stage and be preferably in the continuous review of the temperature regime in each intermediate zone and perhaps the adjustment of the cooling parameter of each refrigerating module guaranteed, temperature be not less than a critical temperature and thereby cross cold not have strong in bainite transformation occurring also thereby form the degree of undesirable bainite structure composition.
This process of cooling and successive refrigerating module comprise a plurality of cooling steps relevantly and comprise a plurality of time period and/or a plurality of soaking time section and/or a plurality of ring cool time sections of reheating with the intermediate zone that is used to eliminate structural stress relevantly.In this case, workpiece can pass through the different stress relieving time periods through an identical stress relieving time period or in each different intermediate zone in all intermediate zones.Here, reheat or finish, and/or finish by outside heat supply by the waste heat that still remains in the workpiece.So, adjust the roughly cooling curve of toothing, it is to the final tissue that will obtain and and then mechanical property produced advantageously influence.So suppress the generation of bainite, promptly adjust the parameter of cooling section, thereby can not form bainite in any moment of cooling operations.
The present invention has also comprised such measure, and promptly these intermediate zones were used to carry out soaking in whole being divided into of whole work-piece and especially rolled piece, perhaps were used to speed of cooling and cooled off lentamente.
The best actual temperature value of measuring separately according to each intermediate zone is adjusted the specific cooling parameter of each follow-up cooling zone and is adjusted at the cooling parameter of preceding refrigerating module simultaneously.This means, should be sometime or the predetermined theoretical temperatures that occurs in intermediate zone as long as workpiece or rolled piece have departed from one, then by in follow-up refrigerating module, distinguishingly changing cooling parameter, this workpiece or rolled piece are re-adjusted to theoretical temperatures, and adjust refrigerating module the preceding simultaneously for follow-up workpiece.
Be preferably in the intermediate zone end and promptly eliminate the terminal measuring workpieces surface temperature in district at structural stress.Temperature survey in the intermediate zone also can be used to quality monitoring.
Promptly carry out this surface temperature measurement according to a preferred embodiment by a non-contact optical survey meter by a pyrometer.
Preferably finish cooling parameter and the especially control of cooling intensity here by pressure-controlling, described pressure is exactly that heat-eliminating medium is ejected into the pressure of workpiece surface with it, and/or by controllably adjusting coolant temperature and/or carrying out above-mentioned cooling parameter adjustment by the volumetric flow rate of controllably adjusting heat-eliminating medium by selection cooling jet geometrical shape.As heat-eliminating medium, pay the utmost attention to water coolant.
Pressure-controlling is preferably undertaken by a pressure regulator valve in leading to the transfer line of nozzle, and these nozzles are placed on the water spray cooling beam.Cooling intensity also can realize by the different spray nozzles quantity that controls each water spray cooling beam or each cooling boom device.
A particularly preferred embodiment according to coolant temperature control has stipulated that heat-eliminating medium and especially water coolant were preheating to such degree before being sprayed onto on the workpiece surface, promptly can or just can not occur being lower than Leiden Fu Luosite temperature very late.
Leiden Fu Luosi phenomenon is meant, the out of use state of liquid that occurs when the temperature of relevant object is higher than the gasification temperature of liquid.Water for example can't continue evaporation and also thereby in following period of time lose cooling effect by the gas skin of water vapor formation.The prerun temperature of water coolant can have influence on Leiden Fu Luosite temperature.Leiden Fu Luosite temperature improves along with the rising of water coolant prerun temperature, and cooling performance weakens.Just for be not less than or very late after can be lower than Leiden Fu Luosite temperature and stipulated pre-hot cooling water.This benefit of bringing cool off exactly weaken and thereby can reappear better.
According to a preferable methods step, before workpiece enters cooling section or in the measuring workpieces temperature, this temperature value is used to preset cooling parameter, is ejected into the setting of the pressure on the workpiece surface with preconditioning, the especially heat-eliminating medium of the cooling parameter that realizes each refrigerating module with it.
Description of drawings
From dependent claims and follow-up specification sheets, obtain other details of the present invention and advantage, in follow-up specification sheets, described embodiment as shown in the figure of the present invention in detail.In addition, except above-mentioned characteristics combination mode, these features individually or also very important under the situation of other array mode to the present invention, accompanying drawing is depicted as:
Fig. 1 is the schematic overview of a cooling section, carries out method of the present invention in this cooling section;
Fig. 2 represents a temperature-time curve, it be included within the rail head of an ordinary steel rail steel and on the cooling curve of five measurement point, this rail steel contains has an appointment the manganese of 0.8% carbon and 1.0% and runs into such cooling curve according to method in a cooling section, promptly is not lower than the bainite temperature;
Fig. 3 shows the temperature-time curve of five cooling curves of a uncontrolled process of cooling with contrasting, has been lower than the bainite temperature in this process of cooling.
Embodiment
Cooling section 1 shown in Figure 1 and shape mill machine row (not shown) join as a milling train unit that is used for the beam-and-rail shaped steel made by rail steel.In the embodiment shown, cooling section 1 comprises five refrigerating module 2a-e, but this cooling section is not limited to such refrigerating module quantity.Each refrigerating module 2a-e constitutes like this, and promptly they comprise one or more water spray cooling beams or cooling jet device.The pressure of the water coolant that sprays from each nozzle can be regulated by a pressure regulator valve 3a-e separately.True pressure is measured by pressure-measuring device 4a-e.Between each refrigerating module 2a-e, be provided with intermediate zone 5a-e.On the end of intermediate zone 5a-e, be provided with a pyrometer that is used for the surface temperature of the rolled piece of opticmeasurement non-contactly in this intermediate zone respectively,, measure the surface temperature of the rail head of rail section bar here.
In the inlet region (12) of cooling section 1 or the front of the first refrigerating module 2a of starting point, be provided with an additional pyrometer 6f.Each pyrometer 6a-f is connected with a computer 8 by signal line 7a-g.Computer 8 connects by control corresponding circuit 9a-e, so that change each variable valve 3a-e of heat-eliminating medium nozzle.Heat-eliminating medium and especially water coolant (KW) are sent to each refrigerating module 2a-e by the common transfer pipe 10 of a band escape route 10a-e.In order to regulate force value, also be provided with a control loop that comprises the pressure-measuring device 4a-e of computer 8.
Below working process to be described.Before rolled section steel such as rail enter cooling section, obtain actual surface temperature value as a two-colour pyrometer by the first pyrometer 6f.This first surface temperature value is transferred to computer 8, and this computer independently is worth the preset operation (presetting) that has started each variable valve according to this, so that adjust cooling water pressure and temperature of cooling water.Through the first module 2a and after finishing first cooling step, rail enters the first intermediate zone 5a, finishes eliminating stress the stage of tissue in this zone.At the end of the first intermediate zone 5a, carry out once more surface temperature measurement (T as a two-colour pyrometer by one second pyrometer 6a IST).The actual value that is obtained is transferred to computer 8 and carries out theoretical value (T in this computer by signal line 7a and 7g SOLL) and actual value (T IST) difference calculate.In this case, theoretical value always can occur on the material specified temp of bainite.This theoretical value is relevant with the alloying situation and can obtain by experiment.The reference value that is used for the critical temperature that the cooling operations at rail steel should not surpass is about 400-500 ℃.
As long as have difference between actual value and theoretical value, then the cooling parameter of that of back or a plurality of refrigerating modules here is that the pressure of shower cooling water will be adjusted by changing pressure regulator valve 3a-e.In this case, adjust force value continuously according to the actual pressure value of being surveyed.
Described adjustment operation repeats according to the temperature value that records among other intermediate zone 5b-e at each.Simultaneously, the preferably also following measure of regulation, i.e. that refrigerating module of back not only, and also one or more refrigerating modules in front are also in order to want subsequently the refrigerative rolled piece to adjust.
Fig. 2,3 represents cooling curve through the rail head of adjusting or not adjusting by temperature-time figure, and this rail head is that 0.8% material constitutes by carbon content.Term C80W60 or C80W65 have shown, in the speed of cooling of rail head core (for example, according to the rail shape of AREA136 [supply of material agreement of american railway engineering association]) than the speed of cooling height in the marginarium not many, therefore, in core area, under comparatively high temps, taken place from the austenite to the perlite or the transformation of ferrite-pearlite.
On five of rail head different measurement point, obtain temperature curve in time.Here, the 1st, a measurement point in the rail head core, the 2nd, 5 millimeters places measurement point under the surface, the 3rd, 5 millimeters places measurement point under the side, the 4th, a measurement point on side surface, the 5th, a measurement point on rail head surface.As shown in the figure, the rail head tissue has not experienced because of cooling at any time on any point and may form the cold excessively of bainite.
This mimic cooling section can come independent control by five modules.These cooling curves among Fig. 2 have shown, will not be lower than and will form the critical temperature of bainite.On the cooling curve 4,5 of expression rail head surface cooling situation, can see zig-zag cooling curve by the reheat in intermediate zone and uniform temperature zone.
On the contrary, Fig. 3 shows the cooling section of five refrigerating modules that can not regulate separately, therefore, the phenomenon of bainite temperature occurred being lower than in the zone (curve 4,5) near the surface of rail head.
The method of passing through to be proposed realized, when rail steel when rolling heat begins to turn cold, can adjust nodular troostite tissue or ferrite/pearlitic structure, and the bainite composition of mechanical property and especially wear resisting property can not occur having influence on unfriendly simultaneously.

Claims (23)

1, cooling has the workpiece of nodular troostite tissue or ferrite/pearlitic structure and the method for the shaped steel rolled piece that especially is made of rail steel, wherein make this red-hot workpiece the cooling section (1) of an inlet region (12) and an outlet area be arranged and accept cooling operations through one, experienced the transformation that becomes pearlitic structure or ferrite/pearlitic structure in this case, it is characterized in that, make this workpiece through such cooling section, promptly this cooling section comprises independently a plurality of, refrigerating module (2a-e) that arrange and that have the cooling parameter that independently to adjust before and after in the cooling section length range, wherein between these refrigerating modules (2a-e), be useful on the intermediate zone (5a-e) of eliminating structural stress, these intermediate zones have be used for determining in these between the actual temperature (T of each rolled piece in district (5a-e) IST) device, here, according to the actual temperature value (T at that time of this workpiece in an intermediate zone (5a-e) IST) control specific cooling parameter and the especially cooling intensity of each follow-up refrigerating module (2b-e) at least, so that in whole process, guarantee a specified temperature of this workpiece, the wherein described specified temperature (T of this workpiece through cooling section (1) SOLL) always on the critical temperature of a formation bainite structure composition.
2, method of cooling as claimed in claim 1, it is characterized in that, this process of cooling ground relevant itself with the successive refrigerating module constitute by a plurality of cooling steps and with the continuous intermediate zone that is used to eliminate structural stress relevantly by the time period of time period that reheats and/or insulation and/or slowly the refrigerative time period is formed.
3, method of cooling as claimed in claim 1 is characterized in that, with the actual temperature value (T that measures separately of one or each intermediate zone (5a-e) IST) control the specific cooling parameter of each follow-up refrigerating module (2a-e) relevantly and control the cooling parameter of refrigerating module (2a-d) the preceding simultaneously.
4, method of cooling as claimed in claim 2 is characterized in that, with the actual temperature value (T that measures separately of one or each intermediate zone (5a-e) IST) control the specific cooling parameter of each follow-up refrigerating module (2a-e) relevantly and control the cooling parameter of refrigerating module (2a-d) the preceding simultaneously.
5, as the described method of cooling of one of claim 1 to 4, it is characterized in that the terminal measuring workpieces surface temperature of (5a-e) in the intermediate zone.
6, as the described method of cooling of one of claim 1 to 4, it is characterized in that, carry out this actual temperature by a non-contact optical survey meter and measure (T IST).
7, method of cooling as claimed in claim 5 is characterized in that, carries out this actual temperature by a non-contact optical survey meter and measures (T IST).
8, as the described method of cooling of one of claim 1 to 4, it is characterized in that, control the control that obtains cooling parameter and especially cooling intensity by the pressure-controlling and/or the temperature of heat-eliminating medium.
9, method of cooling as claimed in claim 5 is characterized in that, controls the control that obtains cooling parameter and especially cooling intensity by the pressure-controlling and/or the temperature of heat-eliminating medium.
10, method of cooling as claimed in claim 6 is characterized in that, controls the control that obtains cooling parameter and especially cooling intensity by the pressure-controlling and/or the temperature of heat-eliminating medium.
11, as the described method of cooling of one of claim 1 to 4, it is characterized in that, this heat-eliminating medium and especially water coolant were preheating to such degree before being ejected on the workpiece surface, promptly be not less than Leiden Fu Luosite temperature or be not lower than this Leiden Fu Luosite temperature during preheating than heat-eliminating medium more lately.
12, method of cooling as claimed in claim 5, it is characterized in that, this heat-eliminating medium and especially water coolant were preheating to such degree before being ejected on the workpiece surface, promptly be not less than Leiden Fu Luosite temperature or be not lower than this Leiden Fu Luosite temperature during preheating than heat-eliminating medium more lately.
13, method of cooling as claimed in claim 6, it is characterized in that, this heat-eliminating medium and especially water coolant were preheating to such degree before being ejected on the workpiece surface, promptly be not less than Leiden Fu Luosite temperature or be not lower than this Leiden Fu Luosite temperature during preheating than heat-eliminating medium more lately.
14, method of cooling as claimed in claim 8, it is characterized in that, this heat-eliminating medium and especially water coolant were preheating to such degree before being ejected on the workpiece surface, promptly be not less than Leiden Fu Luosite temperature or be not lower than this Leiden Fu Luosite temperature during preheating than heat-eliminating medium more lately.
15, as claim 7,9 or 10 described method of cooling, it is characterized in that, this heat-eliminating medium and especially water coolant were preheating to such degree before being ejected on the workpiece surface, promptly be not less than Leiden Fu Luosite temperature or be not lower than this Leiden Fu Luosite temperature during preheating than heat-eliminating medium more lately.
16, as the described method of cooling of one of claim 1 to 4, it is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
17, method of cooling as claimed in claim 5 is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
18, method of cooling as claimed in claim 6 is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
19, method of cooling as claimed in claim 8 is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
20, method of cooling as claimed in claim 11 is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
21, method of cooling as claimed in claim 15 is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
22, as the described method of cooling of one of claim 12 to 14, it is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
23, as claim 7,9 or 10 described method of cooling, it is characterized in that, enter cooling section (1) before or in the measuring workpieces temperature, and this temperature value is used to preset the cooling parameter of each refrigerating module.
CNB028151186A 2001-08-01 2002-07-25 Method for cooling work pieces especially shape-rolled products from rail steel CN1232661C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10137596.4 2001-08-01
DE10137596A DE10137596A1 (en) 2001-08-01 2001-08-01 Cooling workpieces, especially profile rolled products, made from rail steel comprises guiding the workpieces through a cooling path composed of cooling modules with independently adjustable cooling parameters

Publications (2)

Publication Number Publication Date
CN1537175A CN1537175A (en) 2004-10-13
CN1232661C true CN1232661C (en) 2005-12-21

Family

ID=7693931

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB028151186A CN1232661C (en) 2001-08-01 2002-07-25 Method for cooling work pieces especially shape-rolled products from rail steel

Country Status (10)

Country Link
US (2) US20040187974A1 (en)
EP (1) EP1412543B1 (en)
JP (1) JP4174423B2 (en)
KR (1) KR100583301B1 (en)
CN (1) CN1232661C (en)
AT (1) AT288503T (en)
DE (2) DE10137596A1 (en)
ES (1) ES2236592T3 (en)
RU (1) RU2266966C2 (en)
WO (1) WO2003012151A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10137596A1 (en) 2001-08-01 2003-02-13 Sms Demag Ag Cooling workpieces, especially profile rolled products, made from rail steel comprises guiding the workpieces through a cooling path composed of cooling modules with independently adjustable cooling parameters
DE102007009937A1 (en) * 2007-03-01 2008-09-04 Schuler Smg Gmbh & Co. Kg Metal plate shaping heats the plate to a given temperature, which is then clamped between two cooling elements before pressing
ITMI20072244A1 (en) 2007-11-28 2009-05-29 Danieli Off Mecc Device for heat treatment of rails and related process
BRPI1012327B1 (en) * 2009-03-27 2018-01-16 Nippon Steel & Sumitomo Metal Corporation Device and method for cooling railwelding zone
ITLI20090004A1 (en) * 2009-05-21 2010-11-22 Lucchini S P A High-strength rails with colonial pearlitic morphology with high toughness-tensile strength ratio and homogeneity of mechanical and technological properties and relative manufacturing process.
RU2447163C1 (en) 2010-08-10 2012-04-10 Общество С Ограниченной Ответственностью "Исследовательско-Технологический Центр "Аусферр" Method of metal structure alloy thermal treatment
DE102010049020B4 (en) * 2010-10-21 2015-02-19 Cmi M+W Engineering Gmbh Apparatus for cooling metal belts or sheets conveyed on a conveyor line
RU2456352C1 (en) 2010-11-11 2012-07-20 Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" Procedure and device for thermal treatment of rails
RU2484148C1 (en) 2011-10-27 2013-06-10 Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" Method and device for thermal treatment of rails
US9429374B2 (en) 2012-02-06 2016-08-30 Jfe Steel Corporation Rail cooling method
EP2644719A1 (en) 2012-03-28 2013-10-02 Siemens Aktiengesellschaft Cooling control
RU2487178C1 (en) * 2012-06-01 2013-07-10 Открытое акционерное общество "ЕВРАЗ Объединенный Западно-Сибирский металлургический комбинат" (ОАО "ЕВРАЗ ЗСМК") Method for thermal treatment of rails
EP2674504A1 (en) * 2012-06-11 2013-12-18 Siemens S.p.A. Method and system for thermal treatments of rails
CN102839268B (en) 2012-08-28 2014-08-13 攀钢集团攀枝花钢铁研究院有限公司 Heat treatment method of bainite switch rail
DE102012020844A1 (en) * 2012-10-24 2014-04-24 Thyssenkrupp Gft Gleistechnik Gmbh Process for the thermomechanical treatment of hot-rolled profiles
CN103898303B (en) * 2012-12-31 2016-06-08 攀钢集团攀枝花钢铁研究院有限公司 The heat treatment method of a kind of turnout rail and turnout rail
FR3017880B1 (en) * 2014-02-21 2018-07-20 Compagnie Generale Des Etablissements Michelin PROCESS FOR THERMALLY TREATING CONTINUOUS COOLING OF A STEEL PNEUMATIC REINFORCING ELEMENT
CN109852782B (en) * 2019-01-09 2020-06-16 邯郸钢铁集团有限责任公司 Method for eliminating R350LHT steel rail heat treatment black spot

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013759B (en) 1955-12-30 1957-08-14 Siemens Ag Protection circuit for electrical medium or low voltage distribution systems
US4243441A (en) * 1979-05-09 1981-01-06 National Steel Corporation Method for metal strip temperature control
US4486248A (en) * 1982-08-05 1984-12-04 The Algoma Steel Corporation Limited Method for the production of improved railway rails by accelerated cooling in line with the production rolling mill
JPS60221533A (en) * 1984-04-17 1985-11-06 Kawasaki Steel Corp Device for cooling metallic strip
EP0186373B1 (en) * 1984-12-24 1990-09-12 Nippon Steel Corporation Method of and apparatus for heat treating rails
US4938460A (en) * 1987-03-19 1990-07-03 Chemetron-Railway Products, Inc. Apparatus for air quenching railway heads
US4886558A (en) * 1987-05-28 1989-12-12 Nkk Corporation Method for heat-treating steel rail head
DE19503747A1 (en) * 1995-02-04 1996-08-08 Schloemann Siemag Ag Method and device for cooling hot-rolled profiles
US6689230B1 (en) * 1995-02-04 2004-02-10 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for cooling hot-rolled sections
DE19850253A1 (en) * 1998-10-31 2000-05-04 Schloemann Siemag Ag Method and system for controlling cooling sections
DE10137596A1 (en) * 2001-08-01 2003-02-13 Sms Demag Ag Cooling workpieces, especially profile rolled products, made from rail steel comprises guiding the workpieces through a cooling path composed of cooling modules with independently adjustable cooling parameters

Also Published As

Publication number Publication date
AT288503T (en) 2005-02-15
RU2266966C2 (en) 2005-12-27
KR100583301B1 (en) 2006-05-25
ES2236592T3 (en) 2005-07-16
US20100207305A9 (en) 2010-08-19
US20040187974A1 (en) 2004-09-30
US7854883B2 (en) 2010-12-21
US20080018027A1 (en) 2008-01-24
DE50202183D1 (en) 2005-03-10
WO2003012151A1 (en) 2003-02-13
EP1412543B1 (en) 2005-02-02
JP2004537649A (en) 2004-12-16
KR20040015347A (en) 2004-02-18
DE10137596A1 (en) 2003-02-13
JP4174423B2 (en) 2008-10-29
RU2004105954A (en) 2005-03-27
EP1412543A1 (en) 2004-04-28
CN1537175A (en) 2004-10-13

Similar Documents

Publication Publication Date Title
CN101583486B (en) Coated steel strips, methods of making the same, methods of using the same, stamping blanks prepared from the same, stamped products prepared from the same, and articles of manufacture which contains
KR101138725B1 (en) Device for influencing the temperature distribution over a width
CN101181718B (en) Method for producing wide strip steel by bar strip continuous casting and rolling as well as system therefor
Chen et al. Spray and jet cooling in steel rolling
AU680976B2 (en) Rail of high abrasion resistance and high tenacity having pearlite metallographic structure and method of manufacturing the same
RU2128717C1 (en) Aggregate for making stainless steel strip
KR100442035B1 (en) Production equipment for continuously or discontinuously rolling hot-rolled strips
AU2006308245B2 (en) Method for producing hot strip with a multiphase structure
US5221513A (en) Apparatus and method for net shape finishing of gears
DE69814513T2 (en) Rolling process and mill for thin flat products
EP0842715B1 (en) Seamless steel pipe manufacturing method and equipment
CN1123403C (en) Method and equipment for rolling hot-rolling wide strip steel in small sized strip steel production equipment
RU2320431C2 (en) Method for producing super-thin hot rolled strips of hot slabs and production line for performing the same
US8557064B2 (en) Method of cooling rail weld zone, and rail weld joint
US6280542B1 (en) Method and apparatus for the manufacture of a steel strip
TWI386261B (en) Verfahren und vorrichtung zum herstellen eines metallbandes durch giesswalzen
CN102199720B (en) Low carbon steel sheet with yield strength over 400MPa and manufacturing method thereof
CN102002628B (en) Method for manufacturing low-carbon steel sheets
CA1322479C (en) Method and apparatus for the manufacture of formable steel strip
US7181943B2 (en) Descaling method for strip-rolling mill
US8601851B2 (en) Method and finishing train for hot-rolling starting material
CA2686377C (en) Method for hot rolling and for heat treatment of a strip of steel
US8522858B2 (en) Method and apparatus for continuous casting
CA1259552A (en) Method of and apparatus for heat-treating rails
Bedford et al. On the thermo-mechanical events during friction surfacing of high speed steels

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model